Enhanced performance of proton exchange membrane fuel cell by introducing nitrogen-doped CNTs in both catalyst layer and gas diffusion layer

Sanying Hou, Bin Chi, Guangzhi Liu, Jianwei Ren, Huiyu Song, Shijun Liao

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

The performance of the proton exchange membrane fuel cell (PEMFC) is significantly improved through introducing nitrogen-doped carbon nanotubes (NCNTs) into the catalyst layer (CL) and microporous layer (MPL) of the membrane electrode assembly (MEA), it reveals by SEM images that the NCNTs are uniformly dispersed in CL and MPL, resulting in the more plenty of porosity, higher surface area, better conductivity, and better prevention of the layer cracks. The BET surface area and pore volume of MPL are increased by 88% and 77% respectively with the addition of 20 wt% of NCNTs in MPL. The membrane electrode assembly (MEA) with adding 20 wt% NCNTs both in cathode CL and in cathode GDL can yield the best cell performance. At a cell temperature of 70 °C and 30 psi back pressures, the current density is up to 1000 mA cm−2 at 0.7 V and 1600 mA cm−2 at 0.6 V, and the max power density reaches 997 mW cm−2.

Original languageEnglish
Pages (from-to)142-150
Number of pages9
JournalElectrochimica Acta
Volume253
DOIs
Publication statusPublished - 1 Nov 2017
Externally publishedYes

Keywords

  • Carbon nanotubes
  • Catalyst layer
  • Microporous layer
  • Nitrogen-doped
  • Proton exchange membrane fuel cell

ASJC Scopus subject areas

  • General Chemical Engineering
  • Electrochemistry

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